Packing of rotary shafts



C. HUTH PACKING OF Roi-A111 SHAFTS Filed Sept. 29. 192

INSIDE e (earl Ha. f by 454* a torlwy 'CARL HUTH, 0F STUTTGA BT, GERMANY, A

PATENT OFFICE.

SSIGNOR TO THE FIRM FEODOB BUBGMANN,

0] DBESDEN-LAUBEGAST, GERMANY.

rncxmo or ROTARY sun-rs.

Application filed September 2a, 1925, Seria My invention relates to the packing of rotary shafts. One object of my invention is to effectively prevent the loss of lubricating 011 frequently discharged at the lateral ends of shaft bearings, change-gear boxes and like members e. g. of automobiles and other means of conveyance.

Another object of my-invention is to provide a packing which will well resist deterioration through heat and will retain its proper sealing efi'ect also under high temperatures and in hot climates.

Another object of this invention is to automatically return the lubricating oil, ad- 'hering to the rotary shaft and freely spreading along the latter. to the respective bearings so as to prevent its being spilled about and adjoining parts becoming soiled by oil and dust. I

With these and other dbjects in view I.

have invented a novel type of packing rings the design and application of which will be fully understood from the following specification taken in connection with the accompanying drawings in which-- Fig. 1 by way of an example shows a shaft bearing in section provided with packing rings according to my invention,

Fig. 2 is a section through a packing ring in a larger scale, and

Fig. 3 is a diagrammatic view of a portion of a packing ring.

Packing rings according to my invention are made of a series of layers of woven.

fabric, alternately asted together, the innermost layer of w ich, i. e. that adjacent to the shaft, presenting at its surface a net work of channels formed by the warp and weft threads of said fabric. The threads of the fabric layer facing the shaft are obliquely disposed with .regard to the main axis of the shaft, so as to helically surround the latter, i. e. thesid'es proper of the threads being in contact with the shaft in contradistincti'on to known in the art 0 rod packing in which the ends of the threads of a fibrous texture are directed against the surface of the rod. I prefer to make rings of said structure of a spirally wound up'ribbon of asbestosfabric the various layers of said ribbon bemg pasted together by means of a semiliquid indie rubber composition known in the art of making packing'rings.

I further propose to use an asbestos-fabpacking slabs and rings' 1 in. 59,397, and in Germany Ma is, 1924.

than the weft threads thereby producing a series of helical yet relatively straight channelselong the warp threads in which the lubricating oil spreading along the shaft from the lnbricator will be thrown backwards by reason-of its adhesion to the shaft and the respective oblique disposition of the said channels, relatively tothe shaft, the cooperation of the shaft and of said'channelsbeing comparable in its essence to that of a screw-conveyor. I

In the drawing a, a, designate packing rings according to my invention cooperatively connected with the ball bearings 12, b, of the shaft 0, the latter being abundantly supplied with lubricating oil from the oil receptacle (1.

war threads e of therings a, a, is diagrammatically indicated by full lines 'in Fig. 1 while the weft threads 6, are indicated by dotted lines.

The arrangement and position of the ric the warp threads of which are thicker The shaft 0 is supposed to rotate in the I direction of the arrow' f. It will be noted, thatthe position of respective warp threads e of both rings is inverse, 'with regard to their angle to' the shaft, viz, conformably to the lubricating oil flowing along the shaft from the center in opposite directions.

Fig. 2 shows in a more natural i. e. perspective way of illustration the arrangement of the threads of the packing ring in which by reason of the specific structure of the fabric the warp threads e a pear to the spectator like rows of grains 0 rye.

Fig. 3 shows somewhat diagrammatically the structure of the fabric. It will-be seen that the warp threads 0 are shown at an i 95 angle of about 40 to the axis of the shaft. This angle may be varied considerably, so long as 1t is less than 45 and at least as large as 5, but the most effective results are obtained with an angle of about 40. The importance of this arrangement is that the direction lie in helical rows running toward the inside of the bearing in'the direction of rotation ofthe shaft, so that with the shaft rotating in the direction of the arrow A, a globule of oil striking the prominence 1 will be moved to the lower end of the same, and will be caught by the successive prominenees 2, 3, and 4 and moved a little nearer the inside of the ring, since each of these prominences of threads running in the .same

Successive prominences is alittle nearer the inside of the ring than the last.

Packing rings accordin to my invention when soa ed with oil .wil keep their yielding properties and resist comparatively high temperatures without any perceptible deterioratio'n or wear.

It will be noted that various changes in the arrangement, form and structure of the packing rings described above may bemade without materially deviating from the spirit and the main ideas of my invention.

What I claim is:

1. A packing for rotary shafts, the inner surface of which presents a woven texture of fibrous material, having warp and weft threads the warp threads being more prominent than the weft threads, saidthreads being arranged in effective position,

'2 obliquely to the axis of the shaft, so as to name to this specification.

helically surround the latter and to form a net work of channels, the latter being adapted to act as a labyrinth packing.

2. A packing ring having the features set forth in claim 1, characterized therein, that the wa threads of the woven texture are thicker 1n diameter than the weft threads to engage the shaft, the prominences of the threads running in the same direction 1 ing in helical rows running toward the insi e of the bearing in the direction of rotation of the shaft.

In testimony whereof I have signed my CARL HUTH. 

